Exploiting the pH-Cross Sensitivity of Ion-Selective Optodes to Broaden Their Response Range
Fabian Steininger,
Johan Palmfeldt,
Klaus Koren
et al.
Abstract:While the pH cross-sensitivity of chromoionophore-based ion-selective optodes (ISOs) has often been regarded as a significant limitation, this paper demonstrates how this apparent drawback can be transformed into a beneficial feature. The response range of chromoionophore-based ISOs shifts proportionally with changes in the sample pH. Thus, integrating them with a stable pH gradient across the optode surface, such as those provided by immobilized pH gradient (IPG) gels, allows for significant enhancement of th… Show more
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